On Thu, 15 Sep 2016 16:36:06 -0500, Paul Gilmartin <paulgboul...@aim.com> wrote:

>On Thu, 15 Sep 2016 07:01:42 -0400, John Eells wrote:
>>The 7-character length restriction comes from the same source.  Users in
>>UADS have one or more members in that data set, depending on its block
>>size and the number of attributes in their user entries.  The last
>>character is numeric, so someone with a lot of attributes might have
>>UADS members USERID0-USERID9.  This causes the last character to be
>>"reserved," and as PDS members may have 1-8 character names, TSO/E user
>>IDs can be 1-7 characters in length.
>So why not relax the 7 character restriction for customers who are
>willing to commit to relying on RACF and forgoing UADS?

Because the 7-character length of TSO user IDs is entrenched in a lot of 
TSO-related code and control blocks. Changing it would be a major undertaking 
for IBM, both for coding and testing, and would involve compatibility issues 
that could also affect a lot of vendor and customer code.


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